Machine for casting stereotype plates and the like



mmm

Feb. T8, 1936. K. scHFLElN MACHINE FOR CASTING STEREOTYPE PLATES AND THELIKE I Filed sept. 21, `1955 @iii Patented Feb. 18, 1936 NITED STATESPATENT OFFICE MACHINE FOR CASTING STEREOTYPE PLATES AND THE LIKE KarlSchein, Bern, Switzerland 1 Claim.

The invention relates to the drive for a machine for casting stereotypeplates and for backing electrotypes of the kind set forth in myapplication 639,311. According to that application the opening andclosing of the valve for controlling the flow of the molten metal intothe mould, and al1 the movements of the mould, are carried out by meansof a swinging toothed segment which is operated by cams and moves thevalve direct by a connecting rod or the like, and the mould through asecond toothed segment which it drives in known manner.

Now in order to provide all the drive parts in a smaller space, and, atthe same time, to carry out the movements of the valve and mould inpositive dependence one from the other, the present invention providesone swinging toothed segment each for opening and closing the controlorgan, on the one hand, and for closing and moving the mould against thepot, as Well as for moving it away from the pot and opening it, on theother hand, and each of these segments vis moved by a special cam.

On the drawing one construction of the invention is shown by way ofexample,

Fig. 1 being a side elevation of the drive,

Fig. 2, a plan after removing the Worm-wheel and Fig. 3, a sectionthrough the worm-gearing and box taken along line 3 3 in Fig. 1.

By the motor a the worm d and worm-Wheel c are driven through thefriction or clutch coupling c which is put in and out of gear by meansof the lever b. On both sides of the worm-wheel e there is a cam groovef, g, of which f serves to move the mould and g to open the valve. Inthe groove f engages a roller h, or the like, on a toothed segment Icpivoted at 1l, and in the groove g engages a roller I, or the like, onthe toothed ,segment m. The toothed segment lc meshes continuously withthe spur-wheel ny and the toothed segment m with the spur-Wheel o. Withthe spur-Wheel n rotates the crank p which moves (Cl. t22---2) themould, while the crank q which moves the valve rotates with thespur-wheel o.

In one revolution of the worm-wheel e the mould and valve describe allmovements necessary for one casting operation. In other words 5 themould is clos-ed by the cam f, toothed segv'ment lc, spur-Wheel n andcrank p and moved towards the pot, and the valve is opened by the cam g,toothed segment m, spur-wheel o and crank q. After some seconds thevalve is closed again through the agency of the same parts, whereuponthe mould is moved away from the pot and opened. As soon as the mould isopened the tappet 1 on th-e actuating shaft w trips the lock s andreleases the lever by, so that Athe clutch c is put cut of gear by thespring t.

The casing u incloses the gear with but little play. The worm d isarranged in the lower part of the casing, the upper part of the casingis arched in accordance with the worm-wheel and the toothed segments arejournaled in the side walls of the casing within the outline of theworm-wheel, so that the whole gear can be provided in a small casingcontaining an oil bath.

What I claim and desire to secure by Letters Patent of the United Statesis:-

In a machine for casting stereotype plates or the like, having a moldand actuating means therefor, a metal supply valve and actuating meanstherefor, the combination of a drive for said mold and valve, comprisingpower means, a worm driven by said power means, a clutch intermittedbetween said power means and said worm, a worm wheel meshing with saidworm, a cam surface provided on each side of said worm wheel, gear meansmounted within the periphery and on each side of said Worm wheel andcooperating with said cam surfaces, and gears meshing with said gearmeans and arranged to transmit motion of the latter to said operatingmeans for the purpose of actuating said mold and valve.

KARL scHFLEIN.

